A specialist Nitrate removal cartridge designed to reduce levels in high nitrate areas.

This cartridge is commonly used by fishkeepers where nitrates present major problems. However, recently these filters have been sought after by people with concerns about allergy induced autism, with nitrates being one of several contaminents that are thought to be problematic.

Life is proportional to nitrate levels and usage - however - testing the efficiency of this system (i.e. to check the cartridge) can be easily achieved using over the counter test strips (these are available from most pet shops which sell fish).